Slow launch means you tend to write monolithic applications. You can't write cli tools with Clojure. You can't compose Clojure applications. You have to write

Slow launch means you tend to write monolithic applications. You can't write cli tools with Clojure. You can't compose Clojure applications. You have to write a big bulky JVM app. Which definitely has its place, but ClojureScript is expanding Clojure's reach.